dt-bindings: timer: renesas: mtu2: Convert to json-schema

* Renesas Multi-Function Timer Pulse Unit 2 (MTU2)

The MTU2 is a multi-purpose, multi-channel timer/counter with configurable

clock inputs and programmable compare match.

Channels share hardware resources but their counter and compare match value

are independent. The MTU2 hardware supports five channels indexed from 0 to 4.

Required Properties:

  - compatible: must be one or more of the following:

    - "renesas,mtu2-r7s72100" for the r7s72100 MTU2

    - "renesas,mtu2" for any MTU2

      This is a fallback for the above renesas,mtu2-* entries

  - reg: base address and length of the registers block for the timer module.

  - interrupts: interrupt specifiers for the timer, one for each entry in

    interrupt-names.

  - interrupt-names: must contain one entry named "tgi?a" for each enabled

    channel, where "?" is the channel index expressed as one digit from "0" to

    "4".

  - clocks: a list of phandle + clock-specifier pairs, one for each entry

    in clock-names.

  - clock-names: must contain "fck" for the functional clock.

Example: R7S72100 (RZ/A1H) MTU2 node

	mtu2: timer@fcff0000 {

		compatible = "renesas,mtu2-r7s72100", "renesas,mtu2";

		reg = <0xfcff0000 0x400>;

		interrupts = <0 139 IRQ_TYPE_LEVEL_HIGH>,

			     <0 146 IRQ_TYPE_LEVEL_HIGH>,

			     <0 150 IRQ_TYPE_LEVEL_HIGH>,

			     <0 154 IRQ_TYPE_LEVEL_HIGH>,

			     <0 159 IRQ_TYPE_LEVEL_HIGH>;

		interrupt-names = "tgi0a", "tgi1a", "tgi2a", "tgi3a", "tgi4a";

		clocks = <&mstp3_clks R7S72100_CLK_MTU2>;

		clock-names = "fck";

	};

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/timer/renesas,mtu2.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Renesas Multi-Function Timer Pulse Unit 2 (MTU2)

maintainers:

  - Geert Uytterhoeven <geert+renesas@glider.be>

  - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

description:

  The MTU2 is a multi-purpose, multi-channel timer/counter with configurable clock inputs

  and programmable compare match.

  Channels share hardware resources but their counter and compare match value are

  independent. The MTU2 hardware supports five channels indexed from 0 to 4.

properties:

  compatible:

    items:

      - enum:

          - renesas,mtu2-r7s72100 # RZ/A1H

      - const: renesas,mtu2

  reg:

    maxItems: 1

  interrupts:

    minItems: 1

    maxItems: 5

    description: One entry for each enabled channel.

  interrupt-names:

    minItems: 1

    items:

      - const: tgi0a

      - const: tgi1a

      - const: tgi2a

      - const: tgi3a

      - const: tgi4a

  clocks:

    maxItems: 1

  clock-names:

    const: fck

  power-domains:

    maxItems: 1

required:

  - compatible

  - reg

  - interrupts

  - interrupt-names

  - clocks

  - clock-names

  - power-domains

additionalProperties: false

examples:

  - |

    #include <dt-bindings/clock/r7s72100-clock.h>

    #include <dt-bindings/interrupt-controller/arm-gic.h>

    mtu2: timer@fcff0000 {

            compatible = "renesas,mtu2-r7s72100", "renesas,mtu2";

            reg = <0xfcff0000 0x400>;

            interrupts = <GIC_SPI 107 IRQ_TYPE_LEVEL_HIGH>;

            interrupt-names = "tgi0a";

            clocks = <&mstp3_clks R7S72100_CLK_MTU2>;

            clock-names = "fck";

            power-domains = <&cpg_clocks>;

    };